#!/usr/bin/env python

import pika

connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
channel = connection.channel()

channel.queue_declare(queue='rpc_queue')

def fib(n):
    if n == 0:
    	return 0
    elif n == 1:
	return 1
    else:
	return fib(n-1) + fib(n-2)

def on_request(ch,method,props,body):
    n = int(body)
    print(" [.] fib(%s)" % n)
    response = fib(n)

    ch.basic_publish(exchange='',routing_key=props.reply_to,properties=pika.BasicProperties(correlation_id=props.correlation_id),body=str(response))

    ch.basic_ack(delivery_tag = method.delivery_tag)


channel.basic_qos(prefetch_count=1)
channel.basic_consume(on_request,queue='rpc_queue')

print(" [x] Awaiting RPC requests")

channel.start_consuming()
